在自然资源的开�利用中人们必须考�其是一个相互联系相互制约互为环境的资源系统这主要依据自然资源的 A分布的地域差异性 b Template




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tomski在自然资源的开�利用中人们必须考�其是一个相互联系相互制约互为环境的资源系统这主要依据自然资源的 a分布的地域差异性 b coloring